1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mamont248 [21]
3 years ago
10

At the 2012 Summer Olympic Games in London, in the Men's Shot Put qualifying round, the distances ranged from 17.58 meters to 21

.36 meters with a mean distance of 19.64 meters and a standard deviation equal to 0.92 meters. If the distribution were truly a normal distribution, what percent of the athletes would have had a distance greater than 20.56 meters, one standard deviation above the mean? There were 40 athletes in the competition. How many athletes does that represent?
a. about 20 athletes
b. about 26 athletes
c. about 6 athletes
Mathematics
1 answer:
chubhunter [2.5K]3 years ago
8 0

Answer:

One standard deviation above the mean means a z-score of 1.0. If we put this into the calculator as normalcdf(1,999) = .159

15.9 percent of the athletes would have a distance greater than 20.56 meters.

Now multiply the number of athletes by the percent.

.159 * 40 = 6.346 = about 6 athletes

c. about 6 athletes

You might be interested in
Please help me find the perimeter!!
uranmaximum [27]

Answer:

119 and 8/14 I think.

Step-by-step explanation:

8 0
3 years ago
In how many ways can we seat 6 people around a round table if Fred and Gwen insist on sitting opposite each other? (Two seatings
vivado [14]
I think 8  differnt ways
8 0
3 years ago
What is 30% of 20????
Bezzdna [24]

Answer:

6

Step-by-step explanation:

30% of 20 = 30% * 20

= \frac{30}{100} * 20

= 6

3 0
3 years ago
A number divided by 5
viva [34]
10 or 25 and a lot more pretty much anything that ends with 0 or 5
6 0
3 years ago
Two teams of movers are lowering a piano from the window of a 10 floor apartment building. The rope breaks when the piano is 30
GuDViN [60]

By solving the motion equations for the piano, we will see that they have 0.7 seconds to react.

<h3>How to find the motion equation for the piano.</h3>

So the piano is in a free fall from a height of 30m.

The motion equations will be given by:

  • The only force acting on the piano will be the gravitational one, thus the acceleration of the piano is the gravitational acceleration: a(t) = -9.8m/s^2 (Where the negative sign is because it is falling down).
  • To get the velocity we integrate over time, because the piano has no initial velocity, the constant of integration is zero: v(t) = (-9.8m/s^2)*t
  • To get the position equation we integrate again, here the initial position is 30 meters above the ground, so that will be our constant of integration: p(t) = (1/2)*(-9.8m/s^2)*t^2 + 30m

<h3>How long takes to fall?</h3>

We want to find the value of t such that the position is equal to zero, so we need to solve:

0 = (1/2)*(-9.8m/s^2)*t^2 + 30m

30m = (1/2)*(9.8m/s^2)*t^2

2*30m/(9.8m/s^2) = t^2

6.1 s^2 = t^2

√(6.1 s^2) = 2.5s = t

This means that the piano falls to the ground in 2.5 seconds.

But the workes notice it when the piano is 14 meters above the ground, it happens when:

p(t) = 14m =  (1/2)*(-9.8m/s^2)*t^2 + 30m

Solving that we get:

30m - 14m =  (1/2)*(9.8m/s^2)*t^2

2*16m/(9.8m/s^2) = t^2

3.27s^2 = t^2

√(3.27s^2) = t = 1.8s

So the piano falls in 2.5 seconds, and the works notice it 1.8 seconds after it starts falling, meaning that they have:

2.5 - 1.8 = 0.7 seconds to react.

If you want to learn more about motion equations, you can read:

brainly.com/question/2473092

4 0
2 years ago
Other questions:
  • Sameer earned $96 in 8 hours. His brother, Amen, earned $132 in 12 hours
    13·2 answers
  • What is the opposite of 4.3
    7·1 answer
  • Tyler used 17.04 gallons of gas. Maria used 6.2 times as many gallons of gas as Tyler. How many gallons of gas did Maria use?
    11·1 answer
  • Help needed ASAP will give BRAINLIEST not a real test
    15·1 answer
  • Monkey Monkey Monkey has died :(
    13·2 answers
  • How much wrapping paper is needed to cover the gift box shown below?<br> SA = 2Lw + 2Lh + 2wh
    9·1 answer
  • Need helppppp asappppp
    12·1 answer
  • At this weekend’s football game, 15 out of the first 50 people who entered the field were not wearing hats. If this sample is re
    14·1 answer
  • Bryan withdrew $60 from his bank account. If this is 15% of the money he had in his account, how much money was in his account b
    9·1 answer
  • What is -4 9/16 written as a decimal?​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!